The lace city display shows that this polychoron well is monostratic (in sloping direction), but also can be considered bistratic (in given orientation).
Dissecting this non-orbiform polychoron accordingly would not only cut the
gybef (at the left slope) into 2 trips, but the whole polychoron gets splitted into
segmentochoric components: into traf (upper stratos) and trippy
(lower one). That cutting plane there shows up a squippy pseudo facet. In fact, the other way round, this polychoron well
can be considered as an external blend of those 2 components.